Door stop



J. J. HULCHER Jan.. .3, 1939. v

DOOR STOP Filed Nov. 1]., 1956 2 Sheets-Sheet 1 n www J J H11/@br DOOR STOP Filed Nov. 11, 195e 2 sheets-sheet 2 Patented Jan. 3, 1939 UNITED STATES PATENT OFFICE 8 Claims.

' This invention relates to door checks and the like whereby the door may be retainedv in open predetermined position to facilitate ventilation and convenience of` entrance and exit.

l-Ieretofore, door checks of various design have been invented, but for the most part they are unsightly, cumbersome and inefficient. In my preferred form the door check mechanism will be completely concealedwithin the door thus overcoming the unsightly appearance of many of these devices. In my modified form, which is particularly adapted for steel doors, the mechanism will be on the outside unless the door is especially constructed to receive it, but will be positioned so as to have the same covered as far as possible with attractive brass beading and nish.

One of the objects of my invention resides in providing a door check completely concealed within the door, directly operable by the rotation of the door knob.

Another object is to provide means for locking the door check in inoperative position if so desired.

Still another object is to provide a device which may be used as an attachment with the usual mortise lock, either within the door or on the outside depending upon the type of door.

Other objects will be disclosed in the specification and claims forming a part of this application.

In the drawings:

Figure 1 is a fragmentary side elevation of a door showing the door check in position;

Figure 2 is an enlarged vertical section showing the operating mechanism on the spindle of the door knob.

Figure 3 is a vertical section taken on line 3-3 of Figure 1;

Figure 4 is a horizontal section taken on line i-t of Figure 2; and

Figure 5 is a vertical section taken on line 5 5 of Figure 2;

Figure 6 is a front elevation,v partly in section, of a modiiied form of the invention;

Figure 7 is a vertical section taken on the line 1 1 of Figure 6;

Figure 8 is a detail horizontal taken on line Bw of Figure 6; and

Figure 9 is an enlarged fragmentary detail in section of the locking mechanism.

Referring to the drawings, in which similar parts are designated by like numerals:

Numeral 6 designates a door having the usual door knobs 1, spindle 8, and mortise lock, not shown. Mounted on the spindle 8 is a double arm member 9 having an angular center portion I designed to conform with the shape of the spindle 8 so that upon the turning of the spindle 8, the arms 9 will likewise be rotated.

Positioned on one side of the door and slidably mounted thereon is a flat U-shaped plate Ii having shoulders I2 overlapping and resting on the arms 9 of the double arm member. A short arm I3 forming a part of plate II extends inwardly through an opening in the door 6, and

in turn connects to a rod I 4, which connects to the stop member I6. The usual escutcheon plate il is placed over the at plate Il and covers the same. Within casing I5 and on either side of rod id, are placed coil springs I8, the top of which l rest against the inner top side of the casing I5 and at the bottom against the stop member I6. A slot I@ is formed in the casing I5 so that a bent rod 2l! having a swivel head 2l can operate vertically in said slot I9, the head 2| being secured in the stop member I6. A roller 22 is mounted on the rod 2U, the other end 23 of the rod 2l! being pivotally connected to a housing 24 mortised into the bottom 25 of the door 6. The

casing I5 is embedded in the front edge of the .g

door and ends ush with the bottom 25 of the door 6. A rubber projection 26 extends from the stop member IS so that in its extended position it is below the bottom 25 of the door 6.

A cam member 21 having a spindle 28 extends through the escutcheon plate I1 having a handle 29 on its outer end. The plate I'I formsy a bearing for said spindle 28 which is adapted to be rotated so as to lift the stop member I6 clear of the floor and hold the same in retracted position. Release of the cam 2l throws the stop member I t in normal extended position so that the same is controlled by operation of the knobs l, rotation of either of the knobs throwing the stop member I6 free of the floor and releaseoi' l same projecting the stop member to contact with the floor and holding the door in that position.

rEhe operation of the door stop is as follows:

When it is desired to utilize the door stop, the

handle 29 will be operated so as to throw the cam f 2l free of contact with the plate II. This permits the stop member It to be directly controlled by the knobs l. Since the springs I8 are within the casing l5 and are normally contracted so as to be capable of forcing the step I6 out of the casing l5 and into contact with the door, the turning of the handle 'I will tilt the double arm member 9, one arm of Which in turn will bear against the shoulder I2 of the plate il and thus raise the rod Ill, and in turn the stop member It,

further compressing the springs I8. When the door has been swung to its desired position, the knobs which will be released will bring the double arm member 9 to a horizontal position, thus releasing the plate II from any upward pull and permit the springs I8 to exert their tension forcing the stop member I6 out of the casing I5 into contact with the floor. When it is desired to move the door to a definite position, the knob, which will again be rotated, retracts the stop member IS into the casing I5 after which the knobs 'i may be released and the'door occupies its new position, being held rmly by the rubber projection 26 in contact with the iioor. The rod 2S, which is pivoted at its end 23, will ride up and down in the slot i9 as the stop member moves in and out of the casing I5. The roller 22 mounted on the rod 20 will likewise be made of rubber or similar material. It is normally out of contact with the floor, and is designed to strike any raised surface upon the door being blown closed, riding up on said raised surface, and thus retracting the stop member iii and raising' the projection 2, preventing the same from being knocked off.

When it is desired not to use the stop member i5, the handle 2i] is rotated, bringing the cam 2 into Contact with the plate ii, raising the same, and holding the plate in locked position and the stop member i6 out of Contact with the oor.

It will be apparent that most of the nism is concealed within the door and the plate li is concealed by the escutcheon plate i?, thus avoiding any unsightly or cumbersome appearance, this being one of the principal objections to devices of this sort.

The modified form of my invention as shownA in Figures 6 through 9 employs the same principle as previously described, but is designed to be used in connection with steel doors or other hard surfaces wherein it is not practical to conceal the mechanism. The rod I instead of being concealed within the door extension along the exposed inner surface and has a covering 3i] of brass or other bright metal. The covering 353 has a channel SI in which the rod i4 is slidably mounted and has flanges 32 which are secured to the surface of the door. The casing i5 is likewise placed on the inner exposed surface in line with the covering di! and is made of polished metal. The U-shaped plate il of Fig. 2 is modified as shown in Figure 6 to take the form of a rectangular frame or plate 33, having a U-shaped portion 3b! extending from the upper end of the frame 33 to receive the angular center portion it ci the double arm member Q. The double arm member contacts with the upper frame portion 35; and the bent rod 2i! carrying the roller 22 is eliminated in this form of the invention.

Numerous variations may doubtless be devised by persons skilled in the art without departing from the principles of my invention. I, therefore, desire no limitations to be imposed on my invention, except such as are indicated in the appended claims.

What I claim is:

l. A door check attachment for use in combination with doors having spindle connected door knobs, comprising a plate having a shoulder slidably mounted on said door, means operatively secured tosaid spindle for raising said plate upon rotation of said knobs, a casing within said door, a stop member slidably mounted in said casing and normally extending beyond said casing, a compression spring within said casing between the top of said casing and said stop member, connecting means between the plate and stop member, said compression spring adapted to be compressed upon rotation of said door knob and the raising of said door stop and adapted to force said door stop out of sa-id casing upon release of said door knob, a rod pivotally connected at one end and the other end extending into said casing through a vertical slot and connecting to said stop member, a roller on said rod.

2. A door check attachment for use in combination with doors having the usual spindle connected door knobs, comprising a casing within and at the lower end of said door, a stop member slidably mounted in said casing, a compression spring normally forcing said stop member out of said casing, means connected to said stop member and extending upwardly therefrom to a position adjacent said knobs, means carried by said spindle and operated by said knobs for raising said connecting means upon rotation of said knobs, a. rod in the bottom of said door pivotally connected at one end, the other end connected to said stop member, a buffer on said rod adapted to retract said stop member upon striking an obstruction, moving up and down with the movement of said stop member.

3. A door check attachment for use in combination with doors having the usual spindle connected door knobs, comprising a casing within and at the lower end of said door, a stop member slidably mounted in said casing, a compression spring normally forcing said stop member out of said casing, means connected to said stop member and extending upwardly therefrom to a position adjacent said knobs, means carried by said spindle and operated by said knobs for raising said connecting means upon rotation of said knobs, a rod in the bottom of said door pivotally connected at one end, the outer end connected to said stop member, said rod moving up and down with the movement of said stop member and adapted to retract said stop member upon striking an obstruction, and cam means for lifting said connecting means and locking it in raised position out of contact with said spindle carried means.

4. A doorl check attachment for use in combination with doors having the usual spindle connected door knobs, comprising a casing within and at the lower end of said door, a stop member slidably mounted in said casing, a compression spring normally forcing said stop member out of said casing, means connected to said stop member and extending upwardly therefrom to a position adjacent said knobs, means carried by said spindle and operated by said knobs for raising said connecting means upon rotation of said knobs, a rod in the bottom of said door pivotally connected at one end, the outer end connected to said stop member, said rod moving up and down with the movement of said stop member, said rod having a rubber roller and adapted to cause said stop member to retract when striking an obstruction, and cam means for lifting said connecting means and locking it in raised position out of contact with said spindle carried means.

5. A door check attachment for use in combination with doors having the usual spindle connected door knobs, comprising a casing at the lower end of said door, a stop member slidably mounted in said casing, a compression shrine 75,

Within said casing normally forcing said stop member out of said casing, means connected to said stop member and extending upwardly therefrom to a position, adjacent said knobs, a covering for said means having a channel formed therein, said means slidable in said covering, other means carried by said spindle and operated by said knobs for raising said connecting means upon rotation of said knobs, and cam means for raising and holding the knob operated means in inoperative position.

6. The combination for use with a door having spindle connected knobs, comprising a rocker member having arms, mountable on the spindle, a plate having shoulders adapted to engage the arms of the rocker members and be supported thereby, cam means for lifting land holding said plate out of engagement with the rocker member and door stop means operatively connected with said plate.

7. 'Ihe combination for use with a door having spindle connected knobs, of a rocker member having arms and mounted on the spindle, a plate having shoulders adapted to engage the arms of the rocker member and be supported thereby, a door stop operatively connected with the plate, a ground contacting roller adjacent the door stop, and means connecting the roller with the 1 door stop whereby the lifting of the roller will raise the door stop.

8. The combination for use with a hinged door, of a door stop adjacent the swinging edge of the door, a ground contacting roller between the door 1 stop and the hinged edge of the door, and means connecting the roller and door stop whereby ele- Vation of the roller will raise the stop.

JULIUS J. I-IULCHER. 

